There were different groups of 'jews', with differing beliefs. So, how far do you want to go, with generalizing. If you equate Yeshua to a very general religious category, very broad, then you aren't saying much. They shared texts.
Look, if you are simply going to ignore the very real, and very extant, cultural phenomenon that people born of a jewish mother are considered jewish (in context of cultural ethnicity), then really there is nothing much to be said.
It's a bit like pretending catholics aren't christians because they don't share protestant beliefs.
If you are going to argue from your very own, very personal, definition of what the word "jewish" means, then obviously you will be disagreeing with everybody else, who understands that words aren't defined by individuals based on their personal opinions.
You can define the word "table" to mean "chair" all you want, but it will just end up confusing conversation when conversing with people who go by the dictionary definition.